[1] Aumann R. J.: Integrals of set–valued functions. J. Math. Anal. Appl. 12 (1965), 1–12 MR 0185073 | Zbl 0163.06301

[2] Bertoluzza C., Corral N., Salas A.: On a new class of distances between fuzzy numbers. Mathware $\&$ Soft Computing 2 (1995), 71–84 MR 1384223 | Zbl 0887.04003

[3] Breiman L.: Probability. Addison–Wesley, Reading, MA 1968 MR 0229267 | Zbl 0753.60001

[4] Casella G., Berger R. L.: Statistical Inference. Wadsworth & Brooks/Cole, Pacific Grove 1990 MR 1051420 | Zbl 0699.62001

[5] Raj D., Khamis S. H.: Some remarks on sampling with replacement. Ann. Math. Statist. 29 (1958), 550–557 MR 0094868 | Zbl 0086.12404

[6] Dudewicz E. J., Mishra S. N.: Modern Mathematical Statistics. Wiley, New York 1988 MR 0920168 | Zbl 0708.62003

[7] López–Díaz M., Gil M. A.: Reversing the order of integration in iterated expectations of fuzzy random variables, and statistical applications. J. Statist. Plann. Inference 74 (1998), 11–29 MR 1665118 | Zbl 0962.62005

[8] Lubiano M. A.: Medidas de variación de elementos aleatorios imprecisos. Ph.D. Thesis. Universidad de Oviedo 1999

[9] Lubiano M. A., Gil M. A.: Estimating the expected value of fuzzy random variables in random samplings from finite populations. Statist. Papers, to appear MR 1716519 | Zbl 0942.62010

[10] Lubiano M. A., Gil M. A., López–Díaz M., López M. T.: The $\vec{\lambda }$-mean squared dispersion associated with a fuzzy random variable. Fuzzy Sets and Systems, to appear

[11] Lubiano M. A., Körner R.: A Generalized Measure of Dispersion for Fuzzy Random Variables. Technical Report, Universidad de Oviedo 1998

[12] Puri M. L., Ralescu D. A.: Fuzzy random variables. J. Math. Anal. Appl. 114 (1986), 409–422 MR 0833596 | Zbl 0605.60038

[13] Thompson S. K.: Sampling. Wiley, New York 1992 MR 1193031